Search results for passive optical networks

Optics & Photonics Jun 12, 2023

Spectropolarimetric imaging: A magical way to get multidimensional information

In the world of optics, capturing high-dimensional optical information is crucial for understanding and characterizing various targets across different scenes. This includes important aspects like irradiance, spectrum, space, ...

Optics & Photonics May 25, 2023

Chip-based quantum key distribution achieves higher transmission speeds

Researchers have developed a quantum key distribution (QKD) system based on integrated photonics that can transmit secure keys at unprecedented speeds. The proof-of-principle experiments represent an important step toward ...

Optics & Photonics May 1, 2023

Lithography-free photonic chip offers speed and accuracy for artificial intelligence

Photonic chips have revolutionized data-heavy technologies. On their own or in concert with traditional electronic circuits, these laser-powered devices send and process information at the speed of light, making them a promising ...

Planetary Sciences Mar 13, 2023

Synchronizing Galileo's satellites with an ensemble of high-performance atomic clocks

Europe's Galileo is the world's most precise satellite navigation system, providing meter-level accuracy and very precise timing to its four billion users. An essential ingredient to ensure this stays the case are the atomic ...

Optics & Photonics Mar 6, 2023

Single-pulse real-time billion-frames-per-second planar imaging of ultrafast nanoparticle-laser dynamics

The soot produced by unburnt hydrocarbon flames is the second largest contributor to global warming, while also harming human health. Researchers have developed state-of-the-art, high-speed imaging techniques to study turbulent ...

Earth Sciences Feb 14, 2023

New technique maps large-scale impacts of fire-induced permafrost thaw in Alaska

About 40 percent of interior Alaska is underlain by ice-rich permafrost—permanently frozen grounds made up of soil, gravel and sand—bound together by ice. Certain conditions, such as climate warming, have intensified ...

Optics & Photonics Jan 9, 2023

Deep learning-designed diffractive processor computes hundreds of transformations in parallel

In today's digital age, computational tasks have become increasingly complex. This, in turn, has led to an exponential growth in the power consumed by digital computers. Thus, it is necessary to develop hardware resources ...

Optics & Photonics Jan 4, 2023

High-performance visible-light lasers that fit on a fingertip

As technologies keep advancing at exponential rates and demand for new devices rises accordingly, miniaturizing systems into chips has become increasingly important. Microelectronics has changed the way we manipulate electricity, ...

General Physics Nov 25, 2022

Synchronizing chaos through a narrow slice of the spectrum

The abstract notion that the whole can be found in each part of something has for long fascinated thinkers engaged in all walks of philosophy and experimental science, from Immanuel Kant on the essence of time to David Bohm ...

Plants & Animals Jul 5, 2022

Eavesdropping on whales in the high Arctic

Whales are huge, but they live in an even larger environment—the world's oceans. Researchers use a range of tools to study their whereabouts, including satellite tracking, aerial surveys, sightings and deploying individual ...

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